Rod-packing



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ROD PACKING. No. 470,802. Patented Mar. 8, 18.92

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ROAD PACKING.

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FRANCIS P. MARTIN, OF EASTON, AND JOHN T. MARTIN, OF SORANTON,PENNSYLVANIA.

ROD-PACKING.

. SPECIFICATION forming part of Letters Patent No. 470,302, dated March8, 1892.

Application tiled June l2, 1891. Serial No. 396,036. (No model.)

T0 all whom it may concern:

Be it known that we, FRANCIS P. MARTIN, residing at Easton, in thecounty of Northampton, and JOHN T. MARTIN, residing at Scranton, in thecounty of Lackawanna, State of Pennsylvania, both citizens of the`United States,have invented new and useful Improvements in Rod-Packings,of which the following is a specification.

Our invention relates to rod-packings, and more particularly to theimprovements thereon shown, described, and claimed by us in anapplication for Letters Patent filed of even date herewith.

It is the purpose of our invention to combine with a rod-packing andwith the steamhousing inclosing the same means whereby the housing maybe arranged either upon the exterior of the stuffing-box of thesteam-cylinder or partly within and partly without said stuffing-box,and whereby a tight steamjoint may be made at the mouth of thestuffing-box without the necessity of grinding a steam-face upon each ofthe engaging parts.

It is our purpose, also, to combine with the steam-housing containingthe packing an outer inclosing box, and to provide means whereby thesteam may have free passage to the interior of the steam-housing, inorder that it may exert its force upon the outer faces or backs of thepacking-rings and clamp them upon the rod. Y

The invention consists in the several novel features of construction andnew combinations of parts yhereinafter fully set forth, and then moreparticularly pointed out and deiined in the claims which conclude thisspecification.

To enable others skilled in the art to make, construct, and use our saidinvention,we will proceed to describe the same fully and in detail,reference being had for such purpose to the accompanying drawings, inWhich- Figure lis a central longitudinal section showing a portion of acylinder-head, the stuffing-box and an outer box, steam-housing, andpacking embodying our invention. Fig. 2 is a similar View showing aslight change in construction. Fig. 3 is an elevation of the outer endof the intermediate port-sleeve shown in Fig. 2. Fig. 4 is a sectionalelevation showing one manner of forming the steam-joint at the mouth ofthe stuffing-box and illustrating one method of using the gland tocompress the sealing-ring upon the end of the housing. Fig. 5 is asectional elevation showing a modified construction of the partsillustrated in Fig. 4.'

The reference-numeral 1 in said drawings designates the cylinder-head,and 2 denotes the stuffing-box, of an ordinary steam-cylinder, the head1 having arod-opening 3, through which the piston-rod 4 reciprocates.

5 indicates a port-sleeve, consisting of a circular block of metalfitting easily within the mouth of the stuffing-box, which it enters forsome little distance, and provided with a collar or fiange 6 to restupon the end of the stuffing-box, a circular cushion '7, of soft metal,being set within a dovetailed channel in the face of the collar to reston the end of the stning-box. In front of the collar or flange 6, or

from its outer face, the solid metal is projected to form -a circularoffset 8, which may be of the same 0r of a different diameter from theportion entering the stufing-boxto form a seat for the open end of anexterior box 9, which will be described hereinafter.

In the port-sleeve 5 are formed a series of steamways or small ports l0,usually drilled at an angle with the axis, so as to open as near theperiphery of the offset 8 as possible, and at the same time pass withinthe angle between the circular body lying in the box and theseating-face of the flange or collar 6.

The exterior box 9 consists of a cylindrical body having an open endresting upon the collar 6 and around the offset 8, its interior diameterbeing usually as great or a little greater than that of thestuffing-box. Upon opposite sides project lugs 12, having bolt-openings13,Which receive the threaded ends of bolts rigid upon thecylinder-head,l

nuts 14 being turned upon the ends of the bolts and forced against thelugs 12. The outer end of the exterior box is closed, save as to arod-opening in which the rod fits closely, as it does also in theportsleeve 5. Within the exterior box is a steam-housing of any suitableform--such, for example, as a IOO sectional housing consisting of aninner section 15, surrounding the rod closely and having a flange 16parallel with the rod, its edge abutting against the outer face of theoffset S. Tithin this tlange, which isV perforated.

with steam-openings 17, is arranged a pack ing-ring 1S, cleft andcornpressible upon the rod by the pressure of the steam and filling thespace between the offset 8 and that part of the housing which surroundsthe rod. The remainder of the housing consists of a scction 19,11aving athickened outer end abutting against the closed end of the exterior boxand closely surrounding the rod, said part having an offset 2O adjacentto said end, within which is placed a wear-plate 2l. From the offset 20a circular shell projects toward and abuts against the section 15, itsopen end being provided with a narrow internal collar 23, within whichlies a second wear-plate 21. Between these two wear-plates a packing-ring 2l is arranged, formed of soft metal and having the essentialcharacteristics of the packings shown and described in the applicationfor Letters Patent led by us of even date herewith. These parts requireno specic description in this application. The shell or ilange 19 isprovided with steamopenings 25, and steam -space is provided around thesectional steam-housing by forming longitudinal ribs 2G upon theinterior face of theouter box, said ribs terminating at a littledistance from the open mouth of the box, in order that a space may beleft between their ends and the offset 5.

Instead of drilling steamways in the portsleeve we may channel thecircular face which surrounds the rod, forming longitudinal grooves 27therein. (Shown in Figs. 2 and 3.) An intersecting channel 2S is cut inthe face of the offset 5 at its inner edge,preferably extending a littledistance outside the ends of the channels 27, as shown in Fig. 3. W'iththis construction the steam-housing 29 may lit the exterior box closely.At itsinner end, which abuts against the olset 8 of the portsleeve andwhich is provided with a narrow internal collar, is placed a port-ring30, similar in its general form and the material of which it is made, tothe wear-plates 2l in Fig. 1. In this port-ring are formed radialnotches 31, cut in its inner face, their outer ends entering notches 32,cut in the back or outer face of the ring and having greater depth atthe points Where they intersect the radial notches. A circular channel33 is also cut in the inner flat face of the port-ring, intersecting theinner ends of the radial notches; but this channel maybe omitted whenthe circular channel 28 is present in the port-ring. This construe tiondoes not differ substantially, so far as the port-ring is concerned,from that shown and described in our application accompanying this,heretofore mentioned.

In some cases it may be desirable to dis` pense with the port-sleeveentirely, and when this is done we can turn the exterior box and bringits closed end next to the stuiling-box 2, as shown in Fig. 5. To forma'steam-joint at the mouth of the stutling-box, the end of the outer boxis slightly turned off to leave a collar or thickened portion 34,surrounding the rod-opening in said end, the collar having an outer facewhich is rounded, curved, or convex, its greatest outside diameterexceeding the interior diameter of the stuffing box, while the smallerend is of such size as to enter the stuffing-box slightly. In thisconvex or rounded surface we set a circular cushion 35, of soft metal,concentric with the axis of the rod-opening and so arranged that it willseat upon the inner edge of the mouth of the stufngbox, which isusually, though not necessarily, dressed off to remove the sharp angleand slightly enter the mouth. Steam enters the outer box throughlongitudinal channels 3G in the face of the rod-opening. XVhen thisconstruction is used, the steam-housing will be provided with asoft-'metal cushion 37, seating upon the closed end of the outer box andsurrounding a series of steamways 3S, drilled through the end ofthehousing. The housing will bc closed at the outer open end of theexterior box by a sealingring 39, having a soft-metal cushion, and thissealing-ring is pressed into the mouth of the box by a gland 40, thebolts 41 passing through the lugs of the outer box and through lugs onthe gland. These parts are so similar to those shown and described inour concurrent application for Letters Patent that their descriptionhere is not essential.

lVhere the size of the stulling-box permits, we may dress olf the outerface of the exterior box to give it a tapering form, the box with thisconstruction resembling afrustum of a cone, the scalene angle beingverysmall. In this tapered face a circular cushion 42, of soft metal, isinserted, part thereof having a diameter in excess and part being ofless diameter than the interior of the stuiling-box. Then the closed endof the box 9 is inserted in the smiling-box, the soft-metal cushion willengage the edge of the open mouth of said box, and as it is forcedtherein the gradually-expanding face of the cushion will be driven moreand more closely and forcibly against the edge and inner face of thebox.9 until a perfectly-tight joint is formed. The steam-housing andpacking used inside the box may be of any suit-able form-as, forexample, that shown in Fig. 5.

The box 9 is driven into the stuITing-box, andthe sealing-ring 39 isalso pressed into its open end by means of nuts 43, turned upon thethreaded ends of bolts 44, rigidly connected to the cylinderhead. Thesebolts pass through the lugs 12 of the outer box and through the lugs Ll5of a gland similar to the gland 40 in Fig. 5. This gland may be turnedend for end, as shown in Figs. Il and 5, respectively, and the nuts 43are turned lup IOO IIO

against the lugs of the gland to the required point.

l. The combination, with a cylinder-head having a rigid projectingstuffing-box 2, of the exterior box 9, arranged bodily outside of thestuffingbox, containing a steam-housing and packing and formed Withlaterally-projecting lugs l2, a yielding collar or ilange bearingagainst the inner end of the exterior box and against the outer end ofthe stuliing-box, the threaded bolts rigid on the cylinder and extendingthrough the lugs formed on the exterior box,` and nuts turned on thebolts and resting against the lugs of the exterior box, substantially asdescribed.

2. In a rod-packing, the combination, with the stufingbox and piston ofa steam-cylinder, of an exterior box containing the steamhousing and itscontained packing, said exterior box having a soft-metal cushion whichslightly enters the mouth of the stuffing-box and forms a tight joint,substantially as described.

3. In a rod-packing, the combination, with the stuffing-box andpiston-rod of a steam-cylinder, of an exterior box having a taperedcylindrical face and provided with a softmetal cushion set in said faceand adapted to partly enter the mouth of the stuffing-box, substantiallyas described.

4. In a rod-packing, the combination, with the stuffing-box andpiston-rod of a steam-cylinder, of an exterior box partly entering saidstuffing-box and provided with a tapered cylindrical surface having asoft-metal cushion seating around the mouth of said stuffingbox, asteam-housing and packing arranged in the outer box and receiving steamthrough channels cut in the face of the rod-opening, a sealingringclosing the housing, and a gland bearing upon the sealing ring andpressed thereon by nuts turned upon bolts passing through the lugs ofthe exterior box and through the lugs of the gland, substantially asdescribed.

In testimony whereof We have hereunto set our hands and affixed ourseals in presence of two subscribing Witnesses.

FRANCIS P. MARTIN. [L s] JOHN T. MARTIN. [L. s]

Witnesses:

FRANK W. MGGURK, JN0. V. GARTNER.

